(
;
FF[4]
GM[1]
SZ[19]
AP[Jago:Version 4.18]
AB[oa][pb][qc][rb][sb]
AW[na][nb][pc][oc][lc][qd][rd]
GN[SacrificeToLive]
(
;
B[ob]
;
W[qa]
(
;
B[ra]
;
W[qb]
(
;
B[pa]
;
W[qb]
(
;
B[rc]
;
W[qa]
;
B[pb]
C[RIGHT
Black sacrifices four stones, but lives.]
)
(
;
B[qa]
;
W[rc]
C[Black gets only one eye.]
)
)
(
;
B[rc]
;
W[pa]
C[Black is captured.]
)
)
(
;
B[qb]
;
W[ra]
C[Black remains with only one eye.]
)
(
;
B[rc]
;
W[ra]
C[Black will eventually be reduced to one eye.]
)
(
;
B[sa]
;
W[qb]
C[Black is captured.]
)
)
(
;
B[qa]
;
W[rc]
(
;
B[ob]
;
W[qb]
C[Wrong. Black gets only a ko.]
)
(
;
B[qb]
;
W[ob]
C[Black has only one eye.]
)
(
;
B[pa]
C[Black has only one eye.]
)
(
;
B[ra]
;
W[ob]
C[Black gets only one eye.]
)
)
(
;
B[rc]
;
W[qa]
(
;
B[pa]
;
W[ob]
C[Black cannot avoid capture.]
)
(
;
B[ob]
;
W[qb]
C[Black is captured.]
)
(
;
B[qb]
C[Black will eventually be captured (White Q19 and P18 is miai to force Black into dead shape).]
;
W[ob]
)
(
;
B[ra]
;
W[ob]
C[Black cannot connect at Q19 because of shortage of liberties.]
)
)
(
;
B[pa]
;
W[ra]
(
;
B[qb]
C[Black has only one eye.]
)
(
;
B[qa]
;
W[rc]
C[Black gets only one eye.]
)
(
;
B[rc]
;
W[qa]
C[Black cannot make two eyes anymore.]
)
(
;
B[sa]
;
W[qa]
C[Black gets only one eye.]
)
)
(
;
B[qb]
;
W[ra]
(
;
B[ob]
;
W[qa]
C[Black gets eventually only one eye.]
)
(
;
B[qa]
;
W[ob]
C[Black gets only one eye.]
)
)
(
;
B[ra]
;
W[ob]
(
;
B[qa]
;
W[rc]
C[Black gets only one eye.]
)
(
;
B[pa]
;
W[qb]
(
;
B[qa]
;
W[rc]
C[Black gets only one eye.]
)
(
;
B[rc]
;
W[qa]
C[Black is captured.]
)
)
(
;
B[qb]
;
W[pa]
C[Black gets only one eye.]
)
(
;
B[rc]
;
W[pa]
C[Black has only one eye.]
)
)
(
;
B[sa]
;
W[qa]
C[Black eventually gets only one eye.]
)
)
tomjk